/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:20:51,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:20:51,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:20:51,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:20:51,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:20:51,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:20:51,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:20:51,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:20:51,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:20:51,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:20:51,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:20:51,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:20:51,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:20:51,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:20:51,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:20:51,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:20:51,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:20:51,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:20:51,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:20:51,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:20:51,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:20:51,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:20:51,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:20:51,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:20:51,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:20:51,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:20:51,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:20:51,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:20:51,658 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:20:51,686 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:20:51,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:20:51,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:20:51,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:20:51,688 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:20:51,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:20:51,688 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:20:51,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:20:51,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:20:51,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:20:51,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:20:51,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:20:51,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:20:51,690 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:20:51,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:20:51,690 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:20:51,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:20:51,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:20:51,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:20:51,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:20:51,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:20:51,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:51,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:20:51,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:20:51,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:20:51,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:20:51,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:20:51,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:20:51,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:20:51,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:20:52,007 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:20:52,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:20:52,013 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:20:52,014 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:20:52,014 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-11-06 19:20:52,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99c83532c/6503db14e8a0415dbc0507a7d0129bec/FLAGee31e1b99 [2019-11-06 19:20:52,769 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:20:52,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-11-06 19:20:52,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99c83532c/6503db14e8a0415dbc0507a7d0129bec/FLAGee31e1b99 [2019-11-06 19:20:52,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99c83532c/6503db14e8a0415dbc0507a7d0129bec [2019-11-06 19:20:52,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:20:52,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:20:52,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:52,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:20:52,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:20:52,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:52" (1/1) ... [2019-11-06 19:20:52,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87f41dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:52, skipping insertion in model container [2019-11-06 19:20:52,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:52" (1/1) ... [2019-11-06 19:20:52,946 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:20:53,084 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:20:54,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:54,362 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:20:54,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:54,846 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:20:54,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54 WrapperNode [2019-11-06 19:20:54,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:54,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:20:54,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:20:54,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:20:54,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (1/1) ... [2019-11-06 19:20:54,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (1/1) ... [2019-11-06 19:20:54,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (1/1) ... [2019-11-06 19:20:54,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (1/1) ... [2019-11-06 19:20:55,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (1/1) ... [2019-11-06 19:20:55,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (1/1) ... [2019-11-06 19:20:55,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (1/1) ... [2019-11-06 19:20:55,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:20:55,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:20:55,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:20:55,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:20:55,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:20:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:20:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:20:55,205 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:20:55,205 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:20:55,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:20:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:20:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:20:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:20:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:20:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:20:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:20:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:20:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:20:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:20:58,976 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:20:58,976 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:20:58,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:58 BoogieIcfgContainer [2019-11-06 19:20:58,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:20:58,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:20:58,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:20:58,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:20:58,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:20:52" (1/3) ... [2019-11-06 19:20:58,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c11bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:58, skipping insertion in model container [2019-11-06 19:20:58,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:54" (2/3) ... [2019-11-06 19:20:58,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c11bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:58, skipping insertion in model container [2019-11-06 19:20:58,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:58" (3/3) ... [2019-11-06 19:20:58,990 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label27.c [2019-11-06 19:20:59,000 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:20:59,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:20:59,019 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:20:59,052 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:20:59,052 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:20:59,052 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:20:59,053 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:20:59,053 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:20:59,053 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:20:59,053 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:20:59,053 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:20:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:20:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 19:20:59,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:59,093 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:59,095 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash 602165681, now seen corresponding path program 1 times [2019-11-06 19:20:59,110 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:59,110 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173832838] [2019-11-06 19:20:59,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:59,481 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173832838] [2019-11-06 19:20:59,482 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:59,482 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:20:59,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991279744] [2019-11-06 19:20:59,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:59,490 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:59,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:20:59,508 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:21:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:09,265 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-11-06 19:21:09,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:21:09,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-11-06 19:21:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:09,309 INFO L225 Difference]: With dead ends: 2984 [2019-11-06 19:21:09,309 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:21:09,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:21:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:21:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-11-06 19:21:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-11-06 19:21:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-11-06 19:21:09,501 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 36 [2019-11-06 19:21:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:09,502 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-11-06 19:21:09,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:21:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-11-06 19:21:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 19:21:09,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:09,517 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:21:09,517 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1312422072, now seen corresponding path program 1 times [2019-11-06 19:21:09,518 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:09,518 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593114185] [2019-11-06 19:21:09,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:09,919 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593114185] [2019-11-06 19:21:09,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:09,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:21:09,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664175006] [2019-11-06 19:21:09,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:21:09,923 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:09,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:21:09,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:21:09,924 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-11-06 19:21:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:20,581 INFO L93 Difference]: Finished difference Result 8649 states and 15485 transitions. [2019-11-06 19:21:20,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:21:20,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2019-11-06 19:21:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:20,620 INFO L225 Difference]: With dead ends: 8649 [2019-11-06 19:21:20,620 INFO L226 Difference]: Without dead ends: 6523 [2019-11-06 19:21:20,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:21:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6523 states. [2019-11-06 19:21:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6523 to 6502. [2019-11-06 19:21:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6502 states. [2019-11-06 19:21:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 9753 transitions. [2019-11-06 19:21:20,878 INFO L78 Accepts]: Start accepts. Automaton has 6502 states and 9753 transitions. Word has length 124 [2019-11-06 19:21:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:20,881 INFO L462 AbstractCegarLoop]: Abstraction has 6502 states and 9753 transitions. [2019-11-06 19:21:20,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:21:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6502 states and 9753 transitions. [2019-11-06 19:21:20,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-06 19:21:20,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:20,887 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:21:20,888 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1874435001, now seen corresponding path program 1 times [2019-11-06 19:21:20,889 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:20,891 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716694649] [2019-11-06 19:21:20,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:21,158 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716694649] [2019-11-06 19:21:21,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119661055] [2019-11-06 19:21:21,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:21:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:21,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:21:21,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:21:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:21,348 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:21:21,348 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-11-06 19:21:21,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523006451] [2019-11-06 19:21:21,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:21:21,350 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:21:21,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:21:21,351 INFO L87 Difference]: Start difference. First operand 6502 states and 9753 transitions. Second operand 3 states. [2019-11-06 19:21:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:25,015 INFO L93 Difference]: Finished difference Result 17267 states and 25492 transitions. [2019-11-06 19:21:25,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:21:25,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-11-06 19:21:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:25,074 INFO L225 Difference]: With dead ends: 17267 [2019-11-06 19:21:25,074 INFO L226 Difference]: Without dead ends: 10771 [2019-11-06 19:21:25,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:21:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2019-11-06 19:21:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 9360. [2019-11-06 19:21:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9360 states. [2019-11-06 19:21:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9360 states to 9360 states and 13070 transitions. [2019-11-06 19:21:25,350 INFO L78 Accepts]: Start accepts. Automaton has 9360 states and 13070 transitions. Word has length 147 [2019-11-06 19:21:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:25,352 INFO L462 AbstractCegarLoop]: Abstraction has 9360 states and 13070 transitions. [2019-11-06 19:21:25,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:21:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9360 states and 13070 transitions. [2019-11-06 19:21:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-06 19:21:25,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:25,356 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:21:25,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:21:25,570 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash -184406120, now seen corresponding path program 1 times [2019-11-06 19:21:25,571 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:25,571 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844921494] [2019-11-06 19:21:25,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 58 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:21:25,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844921494] [2019-11-06 19:21:25,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114141365] [2019-11-06 19:21:25,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:21:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:25,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:21:26,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:21:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 19:21:26,070 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:21:26,070 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:21:26,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606060863] [2019-11-06 19:21:26,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:26,072 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:26,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:26,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:21:26,073 INFO L87 Difference]: Start difference. First operand 9360 states and 13070 transitions. Second operand 5 states.